From: Vasiliy Kulikov <segooon@gmail.com>
Date: Sat, 6 Nov 2010 14:41:31 +0000 (+0300)
Subject: usb: misc: iowarrior: fix information leak to userland
X-Git-Tag: v2.6.35.10~72
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5f5e68292004921ff329aa58d27023f5e10ac27a;p=karo-tx-linux.git

usb: misc: iowarrior: fix information leak to userland

commit eca67aaeebd6e5d22b0d991af1dd0424dc703bfb upstream.

Structure iowarrior_info is copied to userland with padding byted
between "serial" and "revision" fields uninitialized.  It leads to
leaking of contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: Kees Cook <kees.cook@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---

diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index 7dc9d3c69984..b47e694207a3 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -552,6 +552,7 @@ static long iowarrior_ioctl(struct file *file, unsigned int cmd,
 			/* needed for power consumption */
 			struct usb_config_descriptor *cfg_descriptor = &dev->udev->actconfig->desc;
 
+			memset(&info, 0, sizeof(info));
 			/* directly from the descriptor */
 			info.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
 			info.product = dev->product_id;